Since most MediaPlayer components are able to show the album art of the current playing song it would be cool to have a feature like this IFTTT applet.
Whenever the song changes the component/automation cold grab the image, find the most prominent/saturated color (no white or black) from the image and turn all or selected rgb light to that color.
After a quick search if found this ColorFinder to show what I mean regarding the choosing of the color from the album art
Here are some good album arts to test the color choosing: